My two cents....and i have lots of pennies :)
interesting news - wasn't expecting results from this type of drilling.
Basically, it sounds like this - and please correct me if i am wrong!
Rather than "deep drilling", We picked a particular area, maybe a square kilometer?
Historical data exists for this region, but there could be naysayers who protest that gold found near the surface was just dropped there from somewhere else while in transport. So by going a little deeper, and STILL finding gold, that can be "disproved" or eliminated.
They did not go very deep! Sounds like they made a grid and punched holes down about 10 feet or so?
So of course they are not going to find 85 g/ton results :)
What they CAN do now is pin point where they SHOULD drill deeper and maybe get a bit of the lay of the land/validate previous results.
Think about it this way....if they found pockets where there was 2g/ton, and they only went down 10 feet....
Heck, a few lads with shovels and some cases of beer, you could dig yourself out some good stuff over a long weekend. Imagine what you could do with a backhoe :)